Hybrid

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Hybrids were one type of experiment created by the School and other related organizations. They are mostly one type of creature (human, feline, etc.), but with the DNA from another species spliced into their genes. A majority of the hybrids mentioned in the series were human-animal hybrids; however, some of them were animal-animal.

The "rabbit-dog combo" (mentioned by Max soon after one of her headaches in The Angel Experiment)

The "sheep-macaque monkey splice" (also mentioned by Max soon after one of her headaches in The Angel Experiment)

The "mouse-cat experiment" (also mentioned by Max soon after one of her headaches in The Angel Experiment; it was giant mouse that had great balance but was unable to digest either grain or meat, so it starved to death.")